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J. P. SHAMBERGER INTERNAL COMBUSTION ENGINE Filed Sept. 21.

1922 2 Sheets-Sheet 1v amwdo'z OHN PAUL SHAMBERGER.

Gite www- J. P. SHAMBERGER INTERNAL COMBUSTION ENGINE Feb. 5 a

Filed Sept. 21, 2 Sheets-Sheet 2 JOHN PAUL SHAM BERGER.

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Patented Feb. 5, 1924.

UNITED STATES JOHN RAUL SHAMBERGER, OF CLARENDON, VIRGINIA.

INTERNAL-COMBUSTION. Ens-ms.

Application filed September 21, 1922. Serial No. 589,650.

T all whom it may concern Be it known that I, JOHN PAUL SHAM- BERGER, a citizen of the United States, and a resident of Clarendon, in the county of Alexandria and State of Virginia, have invented certain new and useful Improvements in InternaLCombustioh Engines, of which the following is a full, clear, and exact description.

My invention relates to internal combustion engines of the tandem type and more especially to a system of lubricating the cylinders and related parts of an engine similar to the one disclosed in my cope'n'ding application, Ser. No. 539,519, filed February 27, 1922.

An object of the invention is the provision of means for feeding oil to the walls of the upper cylinder and other means for conveying this oil through the piston rod to the lower cylinder and the connecting rod bearing.

Another object of the invention is the provision of means for spraying oil directly on the inner wall of the piston rod for cooling the latter. 7

Other objects and advantages of the invention will be apparent from the following description when taken in connection with the accompanying drawings, in which,

Figure 1 is a vertical transverse section through the engine.

Figure 2 is an enlarged fragmentary perspectlve view of the upper piston and related partsQv Figure 3 is a horizontal section taken on line 33 of Figure 1.

Figure 4 is a horizontal section taken on line 44 of Figure l. I

Figure 5 is a horizontal section taken on line 5-5 of Figure 6, and,

Figure 6 is an enlarged fragmentary vertical section through the piston rod and nozzle.

Referring to the drawing more in detail,

the numeral 1 designates the crank case of an internal combustion engine on which is mounted the engine body 2, the engine being formed of pairsof superposed cylinders 3 and 4. It will be understood, of course, that the engine may be composed of any number of these pairs of cylinders. The cylinders 3 and 4 are open at the top and bottom respectively, and are united by the cylinder head 5 which maybe c'a'st integral if desired.

-8 thereby aiding in cooling the rod.

Positioned in the cylinders 3 and 4 are the pistons 6 :and 7 respectively, the latter being g y e ted by means of the hollow piston rod 8 which is threaded onto the pis- =tons. The lower. piston 7 is provided with a bearing 9 on which is mounted the connect ing rod 10 which connects with the crank 11. 1 he lower cylinder 4 :is formed with an explosion chamber 12 and the upper cylinder 3 with a similar. explosion chamber 13.

The intake manifolds to the upper and lower cylinders 'are'designated by the numerals l4: and 15 respectively, and the exhaust manifolds by the numerals 16 and '17 respectively. Tlie'intake'and'exhau st valves to the various cylinders are operated by the valve rods 18" carries acone'23 connected t'othe flared portion 22 by means of the webs 24. An interm'ediate'po'rtion of the tube within the cylinder 3 is provided with the laterally extending pipes 25 which spray the wall of the cylinder with lubricating oil. The diameter of the pipes 20 and 25 are intended to be in such ratio as will supply the proper amount of oil'for lubricating the cylinder and also the proper amount for cooling the piston rod 8. The upper wall of piston 6 is inclined 'as indicated 'at 26 to guide the lubricating oil from the cylinder to the rod The piston is provided with a circumferential groove 27 perforated as indicated at 28, The upper wall of groove 27 carries the inwardly directed flange 27 which collects the descending oil and guides it to the groove 27' through the vertically extending slots 27 more clearly shown in Figure 2.

The oil which is fed directly to the interior of rod 8 by the pipe 20, as well as that which first lubricates the cylinder 3 and is then directed to rod 8 by means of the flange 27 and inclined surface 26, is received by the dished member 29 which guides a portion thereof to the bearing 9 and causes the remainder to be splashed against the interior wall of the piston 7. As shown in Figure 1, the piston 7 is formed with an inwardly directed flange 30 and grooves or apertures 31. By means of this construction the oil splashed against the inner wall of the piston is collected and guided to the annular groove 32 located on the exterior wall of the piston 7 and thereby aids in the lubrication of the cylinder wall. This piston is further provided with the vertically extending grooves 33 which may be of any desired number and allow the oil to pass to the crank case.

The cylinder head 5 is formed with a plurality of grooves 34 for receiving oil from the pipe 35 for the purpose of lubricating the exterior wall of the connecting rod 8. An additional pipe (not shown) is provided for draining ofi' surplus oil from the grooves 34.

In operation, the oil is pumped from the crank case through the pipe and forced through lateral pipes against the walls of cylinder 3. This oil is eventually collected by the piston flange 27 and uided to rod 8 where it combines with the oi which comes directly through pipe 20. Thus the entire supply of oil unites in cooling the rod. The oil is then projected onto the dished member 29, lubricating the bearing 9 and also being splashed. against the wall of piston 7 The oil is then collected by the flange and directed to the groove 32 by means of the apertures 31, thus aiding in the lubrication of the lower cylinder. The oil drains from groove 32 into the crank case by means of the vertical grooves 33.

From the foregoing description when taken in connection with the accompanying drawings it will be seen that I have provided a simple and reliable means for lubricating engines of the tandem type and one which will supply sufiicient oil to all working parts and will also cool the rod adjoining the two pistons.

In accordance with the patent statutes I have described what I now believe to be the best embodiment of the invention, but I do not wish to be understood thereby as limiting myself or the scope of the invention as many changes and modifications may be made without departing from the spirit of the invention; all such I aim to include in the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a four cycle internal combustion engine, a pair of superposed cylinders arranged end to end, pistons in said cylinders, means rigidly connecting said pistons and adapted to convey oil from one cylinder to the other, and means for feeding oil to the walls of the upper one of said cylinders and directly to said piston connecting means.

2. In a four cycle internal combustion engine, a air of superposed cylinders arranged on to end, pistons in said cylinders, a hollow rod rigidly connecting said pistons, and means for feeding oil to the walls of the upper one of said cylinders and directly to said hollow rod.

3. In an internal combustion engine, a pair of superposed cylinders, pistons in said cylinders, a hollow rod rigidly connecting the pistons, and means for feeding oil directly and continuously to the interior of the hollow rod. 7

4. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons and adapted to convey oil from one cylinder to the other, and means on one of said pistons for receiving the oil conveyed by said rod and directing the same to the respective cylinder wall.

5. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons and adapted to convey oil from one cylinder to the other, means for directing outwardly the oil thus conveyed, and means on the piston of the last-mentioned cylinder for receiving the outwardly directed oil and guiding it to the cylinder wall.

6. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons, means for feeding oil to the walls of one of said cylinders, the piston in the last-mentioned cylinder being constructed and arranged to receive the oil from the cylinder wall and guide the same to said hollow rod. i

7 In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons, means for feeding oil to the walls of one of said cylinders, and a per forated flange on the piston in the lastnamed cylinder adapted to collect the oil from the c linder wall and guide the same to said hol ow rod.

8. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connectinosaid pistons, means for feeding oil to the walls of one of said cylinders, the piston in the last-named cylinder being provided with a circumferential groove having perforations in its lower wall and grooves in its upper wall, and a flange extending inwardly from the groove and adapted to collect oil fed to the cylinder wall and guide the same to said hollow rod.

9. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons, means for feeding oil to the walls of one of said cylinders, the piston of the last-named cylinder having its upper wall inclined toward said hollow rod, and a flange adjacent the upper edge of said inclined wall.

10. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons, means for feeding oil to one of said cylinders, said pistons being con structed and arranged whereby the oil fed to one cylinder is guided to the hollow rod and thence to the walls of the other cylinder.

11. In an internal combustion engine, a pair of cylinders arranged end to end, pistons in said cylinders, a hollow rod connecting said pistons, means for feeding oil to one of said cylinders, said hollow rod adapted to convey said oil to the piston of the other cy linder, means for directing the oil to the inner wall of said last-named piston, and means on said piston for receivlng the oil and directing it to the cylinder wall.

JOHN PAUL SHAMBERGER. 

